A single-zone mini-split pairs one outdoor unit with one indoor unit. A multi-zone system connects two to five indoor units to one outdoor unit, each with its own control. Aarvaks single-zone installs start at $6,500; multi-zone systems are priced by zone count, indoor unit type and line set routing.
When Single-Zone Is the Right Choice
- One room, an addition, a converted garage or an in-law unit
- A space that is used on a different schedule from the rest of the house
- Replacing a single wall heater with heating and cooling
When Multi-Zone Is the Right Choice
- Several rooms that each need their own temperature
- A whole home without ductwork
- Limited outdoor space for more than one outdoor unit
Trade-Offs to Weigh
Multi-zone systems save outdoor space and can cost less than several single-zone systems. Single-zone systems match each outdoor unit to one room exactly, and a problem with one does not affect the others. Some homes use a mix: a multi-zone system for bedrooms and a single-zone system for a large living area.
Sizing Each Zone
Each indoor unit is sized to its room from a load calculation that accounts for room size, windows, sun exposure and insulation. Oversized units cycle on and off; undersized units run constantly. We size every zone at the estimate.
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Frequently Asked Questions
How many indoor units can one outdoor unit run?
Multi-zone systems run two to five indoor units from one outdoor unit, depending on the model.
Is multi-zone cheaper than several single-zone systems?
Often, because one outdoor unit and less outdoor equipment are needed. The written quote compares the options for your home.
Can I add a zone later?
Sometimes, if the outdoor unit has unused capacity and connections. Plan the zones you may want at the start.